Pneumatic sander



1,584,027 T. s. GILMORE PNEUMAT I C SANDER Filed Jan. 15, 1926 THOMAS 5. GILMORE,

//V VENTOR,

HTTORNE X Patented May 11, 1926.

UNITED STATES PATENT OFFICE. v

THOMAS S. GILMORE, OF LA GRANDE, OREGON.

PNEUMATIC SANDER.

Application filed January 13, 1926. Serial No. 81,015.

My invention relates to traction sanders as a class.

The object of my invention is to provide a device of this class, which has an apparatus for pneumatically loosening and forcing sand from a reservoir toward a pre-determined location and is particularly intended for locomotives and vehicles which are run upon rails, but. may be adapted to other vehicles requiring traction aid. I attain these objects, as well as other advantages, by the construction, combination, and arrangement of parts illustrated in the accompanying drawings which form a part hereof.

Fig. I is a side elevation of the device, partly in section.

Fig; II is a longitudinal, sectional View of the. nozzle on the line II-II in Fig. III.

Fig; III is a View of the larger end of the nozzle,

Like characters refer to likeparts in the views.

The pipe 1 extends from a source of sand supply, such as a sand box upon a locomo- 2 tive. The opposing end of this pipe is connected with. the upper opening 2 of a sand.

trap 3 by threaded joints. A pipe 1 ex tends from a source of air sup-ply under pressure to and into a valve shell 5, in which is a three-Way valve of common type having an operating lever 6. valve shell a pipe 7' extends from a port 8 in the shell to a conneotionmember 9, which has a conical shaped passage 10, the smaller opening at. the connection with said pipe, the larger opening being within a lateral port 11 of the trap 3 which port is below and at one side of the inlet 2. In the larger nozzle 12' is positioned, The nozzle has a discharge. opening 13 on its end, of a predetermined diameter. About the base of the nozzle and within the port 11 is a series of small discharge. orifices 1 1, aligned vertical- 1y on each side of the nozzle center, the number and diameter of the same are also predetermined. Opposite the end of the nozzle 12 is another lateral port 15 in the trap 3 positioned below and at. one side of the inlet 2.. A pipe 16,. having threaded connections, extends from Within this port outwardly to a position where sand may be forced through the pipe to deposit along a 6, desired location, as, for example, upon a rail in advance of a wheel travelling forwardly thereon. From the valve shell an From the passage end. ofthe member 9 a threaded other pipe 17 extends from a port 18 in the shell to a nozzle 19 of like kind positioned in a port 20 of the trap 3. Opposite the latter nozzle 19 is a port 21 in the trap 3.

I A pipe 22, having threaded connections, ex

' When the lever is in the dotted line position 6 the said ports are closed and opened reversely. When the lever is-in dotted line position 6 both ports are closed. Sand is discharged by gravity through the pipe 1 into the trap 3.

7 It will now be seen that the valve being closed to the air supply pipe 1,the trap is filled with sand by gravity discharge there of through the pipe- 1. Upon moving the lever 6 tothe position shown in Fig. I, air under pressure rushes through the port 8 and the nozzle 12 into the trap chamber. The nozzle end being in direct alignment with the port 15, sand is driven through it and through the pipe 16 upon a rail in advance of a locomotivedriving wheel for example. The airat the same timev rushes:

through the adjacent openings 14, vertically aligned on each side of the nozzle, and breaks up any packed sand and tends to keepv the sand mass sufic-iently loosened and drive'it toward the discharge port so as to allow the air blast from the nozzle end' to drive the loose sand into the pipe 16. The nozzle of the pipe 17, not being operated, the sand is carried as it falls from the pipe 1 by the strong air current into the pipe 16. When the nozzle 12 is not operated the sand falls below it in the trap, and upon operating the nozzle of the pipe 17 a like action follows to a discharge of sand through the pipe 22 as already described. It hasbeen found in efiicient at critical moments in the movement.

of locomotives, for instance, is so apparent that argument 1n support 1s unnecessary. The arrangement of my devlce with its trap,

filled by gravity, and the directly aligned stallation as part of the equipment in any" common type locomotive and can be placed at very reasonable cost in any other vehicle requiring it. The device as shown has apparatus for a two-way discharge outwardly of the sand. A single discharge may be arranged if desired by omitting the duplicated parts. The position of the openings 14 is such as to afford a discharge of air throughout the body of sand in the trap and toward the port 15. The end of the nozzle 12 is positioned at the beginning of the port 15 to allow discharge of air at-ai point where a suction will occur to draw sand from above and force it through the port. I claim: 1. In a sanding device the combinationof;

a trap having a vertical inlet adapted for the passage of sand through it into the trap, the latter also having an air intake, port 11 and a discharge port 15, positioned laterally in alignmentin opposite walls of the trap, below its inlet, and1a nozzle having its base secured in the port 11,- its free end being approximately at the entrance of the port 15 within the trap, said nozzle being also provided with orifices'in its base positioned vertically on eachside of the nozzle center, supplying thereby auxiliary openings from the portv11 directly into the trap.

5-2. In a sanding device having a trap adapted to receive sand therein andan air intake port 11 and a discharge port 15 aligned in the opposing trap walls laterally below the inlet, a nozzle having its base secured in the port 11, its free end being approximately at the entrance of the port 15 within the trap, said nozzle'also having orifices in its base positioned vertically on each side of the nozzle center, supplying thereby auxiliary openings from the port 11 directly into the trap.

3. In a sanding device the combination of; a trap having a vertical inlet adapted for the passage of sand through it into the trap, the latter also having an air intake port 11 and a discharge port 15 positioned laterally in alignment in opposing walls of the trap, below its inlet, a first pipe extending from a source of air supply under pressure to. a connection for discharge through the port 11, a control valve in said pipe, and

entrance of the port 15 within the trap, said nozzlebeing also provided with orifices in its base positioned vertically on each side of the nozzle center, supplying thereby auxiliary openings from the port 11 directly into the trap. v

4. In a sanding device the combination of; a trap having a vertical inlet adapted for the passage of sand through it into the trap, the latter also having an air intake port 11 and a discharge port 15 positioned laterally in alignment in opposing walls of the trap, below its inlet, a first pipe extending from a source of air" supply under pressure to a connection for discharge through the port 11, a control valve in said 'pipe, a nozzle having its base secured in the port 11., its free end being approximately at the entrance of the port 15 within the trap, said nozzle being also provided withorifices in itsbase positioned vertically on each side of the nozzle center, supplying thereby auxiliary openings from the port 11- directly into the trap, and a second pipe extending from a source of sand supply to a connection-for discharge through the trap inlet.

5. In a sanding device the combinationotg a trap having a vertical inlet adapted; for the passage of sand through it. into the trap, the latter also having an air intake port 11 and a discharge port 15 positioned laterally in alignment in opposingwalls ofthe trap, below its inlet, a first pipe extending from a source of air supply under pressure to a connection for discharge through the port 11, a control valve in said pipe, a nozzle'having its base secured in the port 11, its free end being approximately at the entrance of the port 15 withinthe trap, said nozzle be ing also provided with orifices in its base positioned vertically on each side of the nozzle center, supplying thereby auxiliary openings from the port 11 directly into the trap, a second pipe extending from a source of sand supply to a connection for discharge through the trap inlet, and a third.

pipe extending from a receiving connection in the port 15 to a place of sand discharge.

6. In a sanding device the combination of; a trap having a vertical inlet adapted for the passage of sand through it into the trap, the latter also having an air intake port 11 and a discharge port 15, positioned laterend approximately positioned at the entrance of the port 15 Within the trap, said nozzle being also provided With orifices in its base positioned vertically on each side of thenozzle center, supplying thereby auxiliary openings from the port 11 directly into the trap.

7. In a sanding device the combination of; a trap having a vertical inlet adapted for the passage of sand through it into the trap, the latter also having an air intake port 11 and a discharge port 15 positioned laterally in alignment in opposing Walls of the trap; below its inlet, a first pipe extending from a source of air sup-ply under pressure to a connection for discharge through the port 11, a control valve in said pipe, a nozzle having its base secured in the port 11, its

free end being approximately at the entrance of the port 15 Within the trap,'said nozzle being also provided With orifices in its base positioned vertically on each side of the nozzle center, supplying thereby auXiliary openings from the port 11 directly into the trap, a second pipe extending from a source of sand supply to a connection for discharge through the trap inlet, a third pipe extending froin a receiving connection in the port 15 to a place of sand discharge, and a duplicate series of elements of the kind described, extending from the control valve in the first pipe, through the trap and to a place of sand discharge opposed to that first mentioned.

THOMAS S. GILMORE. 

